Mazda CX-3 Owner's Manual page 347

NOTE
Because there may be a difference between the displayed image, such as indicated below,
and the actual conditions when parking, always verify the safety at the rear of the vehicle
and the surrounding area directly with your eyes.
In the image of the parking space (or garage) displayed on the screen, the back end and
    
distance guide lines may appear aligned in the monitor, but they may not actually be
aligned on the ground.
When parking in a space with a division line on only one side of the parking space, the
   
division line and the vehicle width guide line appear aligned in the monitor, but they
may not actually be aligned on the ground.

When Driving
Rear View Monitor
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